Phi Kappa Phi membership is earned. Admission is invitation-only and requires nomination approval by a chapter. Requirements include:
- Juniors must have completed at least 72 credit hours, with at least 24 semester hours at Saint Martin's University, and rank in the top 7.5 percent of their class.
- Seniors must have completed at least 24 semester hours at Saint Martin's University and rank in the top 10 percent of their class.
- Graduate students must have completed at least 18 graduate hours at Saint Martin's University and rank in the top 10 percent of their class.
- Faculty, professional staff and alumni who achieve scholarly distinction may also be eligible.